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dc.contributor.authorBrakstad, Odd Gunnar
dc.contributor.authorStørseth, Trond Røvik
dc.contributor.authorRønsberg, Marianne Unaas
dc.contributor.authorHansen, Bjørn Henrik
dc.date.accessioned2018-05-16T07:08:58Z
dc.date.available2018-05-16T07:08:58Z
dc.date.created2018-04-09T08:35:03Z
dc.date.issued2018
dc.identifier.citationChemosphere. 2018, 204 87-91.nb_NO
dc.identifier.issn0045-6535
dc.identifier.urihttp://hdl.handle.net/11250/2498258
dc.description.abstractHydrocarbon biodegradation may be slower in cold Arctic than in temperate seawater, and this will affect the toxicity time window of the hydrocarbons. In this study, the acute toxicities of water-soluble phases of 1,3-dimethylnaphthalene, phenanthrene, fluoranthene, and low energy water-accommodated fractions (LE-WAFs) of an evaporated (200 °C+) crude oil, were screened by a Microtox bioassay during biodegradation in cold seawater (4–5 °C). The water-solubility of fluoranthene was too low to provoke a toxic response at any time, whereas the toxicity of 1,3-dimethylnaphthalene and phenanthrene decreased over time in relation to biotransformation of these compounds. In LE-WAFs, the Microtox EC50 was associated with biodegradation of the predominant hydrocarbons (naphthalenes, 2- to 3-ring PAH), as well as with phenol degradation products. The acute toxicities of single hydrocarbons and LE-WAFs persisted for a longer period in the cold seawater than previously shown at higher seawater temperatures. These results suggest implications for fate and effects assessment of hydrocarbons after oil spills in cold environments, like the Arctic. However, further biodegradation studies using Arctic seawater and relevant species for toxicity testing are needed for confirmation.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titleBiodegradation-mediated alterations in acute toxicity of water-accommodated fraction and single crude oil components in cold seawaternb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber87-91nb_NO
dc.source.volume204nb_NO
dc.source.journalChemospherenb_NO
dc.identifier.doi10.1016/j.chemosphere.2018.04.032
dc.identifier.cristin1578225
dc.description.localcode© 2018. This is the authors’ accepted and refereed manuscript to the article. Locked until 6.4.2020 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/nb_NO
cristin.unitcode194,66,10,0
cristin.unitnameInstitutt for biologi
cristin.ispublishedfalse
cristin.fulltextpostprint
cristin.qualitycode1


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